Complete
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7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a In a slapdash manner (11)
  2. 7a Grassy area (4)
  3. 8a Dreadful (8)
  4. 9a US state, capital Cheyenne (7)
  5. 11a Piece of turf dug out by a golfer (5)
  6. 13a Ballroom dance (5)
  7. 14a Convent (7)
  8. 16a Able to change (8)
  9. 17a Bees' home (4)
  10. 18a Rapper at the front of a house (4-7)
  11. 1d Twirl (4)
  12. 2d Laundry (7)
  13. 3d Scot's child (5)
  14. 4d Arithmetical operation (8)
  15. 5d Ham-fisted (5-6)
  16. 6d Chinese waterway (6,5)
  17. 10d Figure of speech – other map (anag.) (8)
  18. 12d Machine for playing music (7)
  19. 15d Choosy (5)
  20. 17d Cod-like fish (4)